As the viewer, you can't opt-out of analytics. The analytics are only identifiable as you (the viewer) if the recorder sends you the video through gmail as ViewedIt will append your email as a query string param to the ViewedIt link. If shared through social media, you'll still send analytics back so that the recorder knows how many views their video got, but you as the viewer won't be identified in those views.
If I'm creating a video, I don't want the people I'm sending it to to feel like I'm getting marketing data from them (assuming I'm not).
1) The terms of service are kinda scary. If I amass a large library of awesome videos you guys can turn off your servers and walk away like it's no big deal and you guys own the videos I make.
2) It seems as though you are doing everything you can to avoid users from embeding videos and want users to visit viewedit.com instead. Will this change?
I would think embedding little video snippets in a web page, interspersed with prose, would be the killer presentation use case. Instead, the product promotes itself to center stage, above the content itself.